Package org.apache.shiro.crypto.cipher

Class BlowfishCipherService

java.lang.Object
org.apache.shiro.crypto.cipher.JcaCipherService
org.apache.shiro.crypto.cipher.AbstractSymmetricCipherService
org.apache.shiro.crypto.cipher.DefaultBlockCipherService
org.apache.shiro.crypto.cipher.BlowfishCipherService
All Implemented Interfaces:
CipherService
public class BlowfishCipherService extends DefaultBlockCipherService
CipherService using the Blowfish cipher algorithm for all encryption, decryption, and key operations.

The Blowfish algorithm can support key sizes between 32 and 448 bits*, inclusive. However, modern cryptanalysis techniques render keys of 80 bits or less mostly worthless - use 128 or more whenever possible.

Note that this class retains the parent class's default CBC mode of operation instead of the typical JDK default of ECB. ECB should not be used in security-sensitive environments because ECB does not allow for initialization vectors, which are considered necessary for strong encryption. See the parent class's JavaDoc and the JcaCipherService JavaDoc for more on why the JDK default should not be used and is not used in this implementation.

* Generating and using Blowfish key sizes greater than 128 require installation of the Java Cryptography Extension (JCE) Unlimited Strength Jurisdiction Policy files.

Since:
1.0

  • Constructor Details

    • BlowfishCipherService

      public BlowfishCipherService()
      Creates a new CipherService instance using the Blowfish cipher algorithm with the following important cipher default attributes:
      Attribute Value
      keySize 128 bits
      blockSize 64 bits (required for Blowfish)
      mode CBC*
      paddingScheme PKCS5
      initializationVectorSize 64 bits
      generateInitializationVectors true**

      * The CBC operation mode is used instead of the JDK default ECB to ensure strong encryption. ECB should not be used in security-sensitive environments - see the DefaultBlockCipherService class JavaDoc's "Operation Mode" section for more.

      **In conjunction with the default CBC operation mode, initialization vectors are generated by default to ensure strong encryption. See the JcaCipherService class JavaDoc for more.